The paper presents analyses of data obtained from oil shale pulverized firing tests carried out at the Eesti Power Plant (EPP) that is part of an Estonian power company Narva Power Plants (NPP) owned by a state company Eesti Energia AS. The tests were conducted at two boiler loads: 50% (158 t/h) and 100% (320 t/h) in the TP-101 boiler. During experiments samples of bottom and fly ashes from inertia dust collectors after the super heater (SH) and economizer (ECO), as well as fly ash from the electrostatic precipitator (ESP) of the first, second and third fields were taken. Analysis of the gas sample taken at the ESP exit was performed. The ash distribution at different ash discharge ports was obtained. Analysis of the ash chemical composition was carried out. The specific consumption of oil shale per useful heat and gross electricity production was found and other techno-economic characteristics were determined. The tests at partial and nominal loads showed that the emission of SO2, CO2, CO, NO and HCl at nominal load were essentially higher. The content of fine ash particles (<2.5 µm) after the ESP was higher at nominal load.
Results of analysis can serve as a basis for future research and development projects. Also, they can be used to decide whether to continue operation of PF units.
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